The polarity of organosilicon polymers can be sub- stantially increased by introducing a nitrile group. The polarity of such polymers allows their use as polar dielectrics in variable-capacity condensers and in gas3liquid chromatography, and also as conducting contact lubricants. However, successful syntheses of methyl-b-cyanoethylsiloxane homopolymers have not been reported; only oligomers with the degree of poly- merization of up to 20 have been ...